Cotter pin removing tool



Nov. 5, 1940. a. J. CYNOSKE COTTER PIN REMOVING TOOL Filed Sept. 19,1939 INVENTOR.

I 1215' ATTORNEY.

Patented Nov. 5, 1940 UNITED STATES PATENT OFFICE COTTER PIN REMOVINGTOOL George J. Gynoske, Middletown, Conn. Application September 19,1939, Serial No. 295,637

1 Claim.

This invention relates to a cotter pin removing tool, and has for itsobject to afiord a device of simple construction, which can beeconomically manufactured, and will afiord a practical device for thepurpose. I

' More particularly the invention has for its object to provide aconstruction that can easily and quickly be positioned in operativerelation to a cotter pin and conveniently manipulated, afiording aleverage such that an operator can with little effort and instantlyremove a cotter pin from any part to which it may be attached.

To these and other ends, the invention consists in the construction andarrangement of parts that will appear from the following descriptionwhen read in conjunction with the accompanying drawing, the novelfeatures being pointed out in the claim following the specification.

In the drawing:

Fig. 1 is a side elevation of a tool constructed in accordance with apreferred embodiment of the invention, showing it in the position ofinitial application to a cotter pin for removing the latter from itssupport;

Fig. 2 is a transverse sectional view on the line 2--2 of Fig. 1;

Fig. 3 is a view similar to Fig. 1 showing the position of the partswhen the jaws have been closed and the cotter pin partially withdrawnfrom its support;

Fig. 4 is a transverse sectional view on the line 4-4 of Fig. 3;

Fig. 5 is a view in elevation, partially broken away, of one of thejaws, and

Fig. 6 is an end elevation of the same.

Referring more particularly to the drawing in which like referencecharacters throughout the several views refer to the same parts, I and 2designate a pair of jaws provided with handle 40 portions 3 and 4respectively, and held in pivotal relationship by means of a bolt 5 andnut 6, as usual in plier constructions.

The jaw I is preferably rounded toward its end, as shown, and providedwith an angularly arranged or laterally extending eye-engaging portion'1 that is preferably rounded or circular in cross-section, and taperedor pointed as shown in Fig. 1. The eye-engaging portion 1 is adapted toengage or pass through the eye 8 of a cotter pin, that is illustrated assecured to a bar or support 9, and includes a body portion Ill and bentends II that normally hold the cotter pin in place. As the device isoperated, the eye-engaging portion 1 passes through the eye 8, as shownin Fig. 2, and forcibly draws the cotter pin away from the support 9, atthe same time straightening the bent extremities H, as illustrated inFig. 4.

To accomplish this, the jaw 2 is provided with a flattened portion l2having an opening l3 extending transversely thereof, while M designatesa pair of laterally extending lugs or ears spaced from each other andpreferably tapered as shown,

the ears l4 being located at the outer ends of the flattened portion 12so as to straddle the body I!) of the cotter pin, and occupy a positionbetween the support 9 and the eye 8, as shown in Fig. 2. The opening 13is somewhat larger than the eye 8 and eye-engaging portion 1, whichlatter is so formed with relation to its jaw i that as the jaws areclosed, the eye-engaging portion 1 moves bodily across the opening l3from the outer to the inner edge thereof, or from the position of Fig. 1to the position of Fig. 3, thus forcibly drawing the cotter pin endwiseof the tool and withdrawing it far enough from its support so that itcan be easilyremoved by pulling it outwardly.

The operation of the device briefly is as follows: To remove a cotterpin, the jaws of the tool are opened, asshown in Fig. l, and the jaw 2is positioned against the support 9 in the manner illustrated in Figs. 1and 2 with the lugs I l straddling the body of the cotter pin andlocated between the eye 8 and support 9, the eye 8 being located overthe outer portion of Opening l3 of the jaw 2. Thereupon the handle 3 ofjaw l is moved toward the handle 4 to move jaw I downwardly, causing theeye-engaging portion 1 to move through the eye 8 and the opening l3 inthe jaw 2. During this movement, the eyeengaging portion 1 moves bodilyfrom one side of the opening Hi to the other side thereof and draws theeye 8 correspondingly from the position shown in Figs. 1 and 2 to thatshown in Fig.

3, and at the same time straightening the bent ends H so that thesubsequent removal of the cotter pin can be easily accomplished.

While the invention has been described with reference to the particularconstruction herein .5

shown, it is not confined to the particular details illustrated, andthis application is intended to cover such modifications or departuresasmay come within the purposes of the invention or the scope of thefollowing claim.

I claim:

A cotter pin removing tool comprising a pair of pivoted jaws, one ofsaid jaws having an opening extending transversely thereof, and a pairof laterally extending lugs at its outer end said opening in the otherjaw, said opening being substantially larger than the eye-engagingportion, whereby the eye-engaging portion acts to move the cotter pinbetween said lugs endwise of the jaw containing said opening and endwiseof 5 the tool as the jaws are brought together.

GEORGE J. CYNOSKE.

